Limited net poleward movement of reef species over a decade of climate extremes

Yann Herrera Fuchs (), Graham J. Edgar, Amanda E. Bates, Conor Waldock and Rick D. Stuart-Smith
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Yann Herrera Fuchs: University of Tasmania
Graham J. Edgar: University of Tasmania
Amanda E. Bates: University of Victoria
Conor Waldock: University of Bern
Rick D. Stuart-Smith: University of Tasmania

Nature Climate Change, 2024, vol. 14, issue 10, 1087-1092

Abstract: Abstract Warming seas are expected to drive marine life poleward. However, few systematic observations confirm movement among entire communities at both warm and cool range edges. We analysed two continent-scale reef monitoring datasets to quantify changes in latitudinal range edges of 662 Australian shallow-water reef fishes and invertebrates over a decade punctuated by climate extremes. Temperate and tropical species both showed little net movement overall, with retreat often balancing expansion across the continent. Within regions, however, range edges shifted ~100 km per decade, on average, in the poleward or equatorward directions expected from warming or cooling. Although some species responded rapidly to temperature change, we found little evidence for mass poleward migration over the decade. Previous studies based on extreme species observations, rather than tracking all species through time, may have overestimated the prevalence, magnitude and longevity of range shifts amongst marine taxa.

Date: 2024
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DOI: 10.1038/s41558-024-02116-w

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